The 15 year [glossary:qualifying interest:585] period must have been continuous.

If a person has bought and sold a series of farms, where there were any periods during which they did not hold a qualifying interest in a farm, they will not satisfy the test.

Documents such as title deeds for the previously owned farms should be obtained to verify that there have been no gaps in farm ownership. In these situations, it may be easier for the person to satisfy the 20 year invovlement in farming test.